Discussion and Scientific Explanations The reaction was conducted using granular tin and hydrochloric acid. This mixture provided both a source of electrons and protons1. The electrons worked as the reducing agent in this mechanism1. Granular tin was chosen over a single plate of tin due to the fact that it would take much more time and effort to fully dissolve a single plate of tin. A plate of tin would be more bonded to each other and less likely to be reactive. With the addition of the concentrated
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Enthalpy changes can be calculated using average bond enthalpy data. i) The enthalpy change to convert methane into gaseous atoms is shown below. [pic] Calculate the average bond enthalpy of a C—H bond in methane. [1] ii) Use the data in the table below and your answer to (a)(i) to calculate the enthalpy change for [pic] [3] [pic] b) The standard enthalpy of formation of 1‚2-dibromoethane‚ CH2BrCH2Br‚ is – 37.8 kJmol-1. Suggest the main reason for
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will be conducted‚ with the formula Mg(s) +2HCl(aq) → H2(g) + MgCl2(aq) Hydrogen gas is produced when hydrochloric acid and magnesium are mixed. The volume of hydrogen gas is found by measuring the volume of the buret after the reaction occurred. The number of moles is found by converting the given amount of grams of magnesium into moles of magnesium using the molar mass and then using the equation to find the number of hydrogen gas mole with a one to one mole ratio. Once finding these two important
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was to make a vertical axis wind turbine (VAWT) that instead of charging a battery‚ would deliver its power directly to an electrolysis apparatus to make hydrogen and oxygen gas. The reason for doing this would be to avoid the complications and expenses of inverters‚ batteries‚ and connecting the turbine to the grid. It would also make hydrogen gas which could power a car‚ a generator‚ or be used as a welding/cutting torch‚ which is what I intended to use it for. That was the idea‚ however I
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between two atoms in which electrons are shared between them. An Example: There is covalent between the oxygen and each hydrogen in (H 2 O). Each of the bonds contains two electrons - one from a hydrogen atom and one from the oxygen atom. Both atoms share the electrons. Combination of silicon and oxygen - The combination of silicon and oxygen is similarly to carbon and hydrogen‚ silicon and oxygen form numerous compounds. They are commonly known as silicates An Example - Beach sand is a good example
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processing applications was investigated over the amorphous Ni–Ru–B/ZrO2 catalyst. The result showed that‚ at the temperature of 210–230 8C‚ the catalyst was shown to be capable of reducing CO in a hydrogen-rich reformate to less than 10 ppm‚ while keeping the CO2 conversion below 1.55% and the hydrogen consumption below 6.50%. # 2009 Xin Fa Dong. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. Keywords: Selective methanation; CO; Amorphous; Ni–Ru–B/ZrO2 catalyst
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but has two less hydrogen atoms. Theobromine is the substance in chocolate that can be toxic to animals. It also has a bitter taste‚ and is found in higher quantities in dark chocolate than milk chocolate. Theobromine increases excretion of water from bodies‚ relaxes‚ and stimulates. There is no evidence of the relationship between the structure and functions. Theobromine is an alkaloid belonging to the methylxanthine group. It is made up of seven carbon atoms‚ eight hydrogen atoms‚ four nitrogen
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Human Physiology ZOOL 2404 Instructor: Dr. Gollahon Copyright © 2009 Pearson Education‚ Inc.‚ publishing as Pearson Benjamin Cummings Introduction Chapters 1 and 2 Study strategies crucial for success Attend all lectures‚ labs‚ and study sessions Read your lecture notes and text materials before listening to the audio or watching the video lectures Devote a block of time each day to your Physiology course Set up a study schedule and stick to it Do not procrastinate!
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Almost everything in our world has some of their origins from chemicals‚ scientists in the chemical industries are always working to find ways to make these chemicals useful to us‚ they bring improvements into daily use substances like paints‚ medicines‚ cosmetics and plastics‚ so that they are more environmentally sustainable‚ and efficient. Scientists employed in the chemical industry trained and specialising in chemistry are called chemists. A chemist can gain expertise in a range of chemistry
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Module 7 Exam Review ANSWER KEY 1. Define acid. (7.01) An acid is a substance that produces hydrogen ions‚ H+ or hydrodium ionsH3O+ in solution. 2. Compare the three theories of acids. (7.01) An Arrhenius acid is a substance the increases the concentration of hydrogen ion‚ H+ or hydronium ions H3O+when dissolved in water. You must have water. A BrØnsted-Lowry acid is any substance that donates a hydrogen ion‚ H+ to another substance. A Lewis acid is any substance that accepts a lone pair of electrons
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